What is killing my Obesum flowers?

White cottony area forms with a round brownish critter inside. I try to scrape them off, but they appear to be prolific. What can I use to kill them? I have no pic as I have removed them as I see them form.

Answers

It sounds like they may be mealy bugs attacking your plant. Adeniums are susceptible to these.
Use cation with pesticide use since desert rose is sensitive to many sprays, especially those containing oils.
I have read that cleaning off the mealies with an alcohol swab works well but you have to do it everytime you see them and not postpone.